Stave-jointer



UNITED STATES PATENT QFFICE.

J. K. DERBY, 0F JAMESTOVVN, NEV YORK.

STAVE-JOIN'IER.

Specication of Letters Patent No. 15,285, dated July 8, 1856.

To all whom t may concern:

Be it known that I, J. K. DERBY, of Jamestown, in the county ofChautauqua and State of New York, have invented a new and ImprovedMachine for J ointing Stavesg'and I do hereby declare that the followingis a full, clear, and eXactdescription of the same, reference being hadto the annexed drawings, making a part of the specification, in which-Figure 1, is a transverse vertical section of my improvement (m), (m),Fig. 2, show ing the plane of section. Fig. 2, is a longitudinalvertical section of the same, (y), (y), Fig. 1, showing the plane ofsection. Figs. 3 and L are sections showing a modification of myimprovement.

My invent-ion consists in properly jointing staves or giving them thenecessary bilge, by placing the staves upon a vibrating or tilting bedwhich is operated by a pattern or guide as will be presently shown anddescribed so that the stave will be thrown or placed in proper relativepositions with the saw to produce the effect desired.

1 To enable others skilled in the art to fully understand and constructmy invention, I will proceed to describe it.

A, represents a rect-angular frame which` may be constructed in anyproper manner to support the working parts.

B, represents a saw shaft or arbor, the ends of which work in properbearings on the upper ends of uprights attached to the frame, A.

C, is a circular saw placed on the shaft or arbor, B.

D, is a carriage which is fitted in t-he frame, A, and works on the toppieces, (a), (a), of the frame. In the carriage, D, a bar, E, isattached longitudinally; said bar having a journal, (Z2), at each end;the journals itting in the front and back cross pieces, (o) (c), of thecarriage and turning freely therein. VTo the center of the bar, E, anupright, F, is attached; and Gr, is a bed, the center of which ispivoted to the upper end of the upright, F. The bed, G, is merely arectangular bar nearly equal in length to the bar, E. To each end of thebed, G, there is pivoted a pendent, II. These pendents pass down throughslots in the bar, E, and have friction rollers, (d),

of the journals, (b), of the bar, E. The

pattern, I, passes through the slot, (c).

'Ihe operation will be readily seen. The stave, K, to be jointed isclamped upon the bed, G, the upper surface of which is perfectly flat sothat the stave is not bent in the least. The edges of the stave projectIbeyond the sides of the bar, E, so that the saw, C, may act upon theedges of the st-ave. As the carriage, D, is shoved along on the frame,A, the slotted plate, J, will tilt or vibrate the bed, the front end ofwhich will be depressed at the commencement of the operation; the plate,J, gradually raising it to an elevated position; the front end of the.bed being elevated to its eXtreme height at t-he completion of theforward stroke of the carriage, D. This tilting of the bed gives theproper bilge to the stave, as thc bed and stave, being necessarily atone side of the saw, is placed obliquely with the plane of the rotationof the saw, and the ends of the staves will be thrown across the saw, sothat the edges of the stave will be cut taper from its center. When oneedge of the stave is sawed the bed, Gr, is placed at the opposite sideof the saw by turning the bar, E, and the opposite edge of t-he stave issawed.

I do not confine myself to the precise arrangement of the pattern, I, asshown in Figs. 1 and 2, for that may be raised or modified as shown inFigs. 3 and 4, where the bar, E, is grooved on one side, as shown at(f), the groove corresponding in shape with the pattern, I; the bed, G,having a screw, (g), passing through it into the This arrangement is anequiva,

groove. lent of that shown in Figs. 1 and 2.

The above invention is simple and operates well. It may be economicallyconstructed, is not liable to getv out of repair and may be operated orattended by any one as shown, the bed being operated by the pat- Witlilittle practice. tern, I, Or its equivalent; substantially as Havingthus described my invention, shown, for the purpose specified. Wbatlclaim as new and desire to secure J. K. DERBY. by Letters Patent, is

The vibrating or tilting bed, G, ittecl or pivoted to a. bar, E, Withinthe carriage, D,

l/Vitnesses:

GEO. A. DOM, S. S. DERBY.

